University of Hertfordshire

From the same journal

From the same journal

By the same authors

Documents

  • G. Zhao
  • L. Mashonkina
  • H. L. Yan
  • S. Alexeeva
  • C. Kobayashi
  • Yu Pakhomov
  • J. R. Shi
  • T. Sitnova
  • K. F. Tan
  • H. W. Zhang
  • J. B. Zhang
  • Z. M. Zhou
  • M. Bolte
  • Y. Q. Chen
  • X. Li
  • F. Liu
  • M. Zhai
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Original languageEnglish
Number of pages26
JournalThe Astrophysical Journal
Journal publication date19 Dec 2016
Volume833
Issue2
DOIs
Publication statusPublished - 19 Dec 2016

Abstract

For the first time, we present an extensive study of stars with individual non-local thermodynamic equilibrium (NLTE) abundances for 17 chemical elements from Li to Eu in a sample of stars uniformly distributed over the $-2.62 \le$ [Fe/H] $\le +0.24$ metallicity range that is suitable for the Galactic chemical evolution research. The star sample has been kinematically selected to trace the Galactic thin and thick disks and halo. We find new and improve earlier results as follows. (i) The element-to-iron ratios for Mg, Si, Ca, and Ti form a MP plateau at a similar height of 0.3~dex, and the knee occurs at common [Fe/H] $\simeq -0.8$. The knee at the same metallicity is observed for [O/Fe], and the MP plateau is formed at [O/Fe] = 0.61. (ii) The upward trend of [C/O] with decreasing metallicity exists at [Fe/H] $$

Notes

G. Zhao, et al, 'SYSTEMATIC NON-LTE STUDY OF THE −2.6 „ [Fe/H] „ 0.2 F AND G DWARFS IN THE SOLAR NEIGHBORHOOD. II. ABUNDANCE PATTERNS FROM Li TO Eu*', The Astrophysical Journal, Vol. 833 (2), December 2016, doi:10.3847/1538-4357/833/2/225. © 2016. The American Astronomical Society. All rights reserved.

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